{"api_version":"1","generated_at":"2026-10-27T04:32:26+00:00","cve":"CVE-2026-99046","urls":{"html":"https://cve.report/CVE-2026-99046","api":"https://cve.report/api/cve/CVE-2026-99046.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99046","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99046"},"summary":{"title":"gve: fix XSK buffer leak on error descriptor","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngve: fix XSK buffer leak on error descriptor\n\nWhen the error bit is set in the RX completion descriptor, the buf_state\nand its attached buffer should be freed. In the case of AF_XDP ZC, the\nXSK buffer was not freed, leading to a leak.\n\nThis issue was caught by LLM.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-23 13:17:28","updated_at":"2026-10-24 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the Linux kernel, the following vulnerability has been resolved:\n\ngve: fix XSK buffer leak on error descriptor\n\nWhen the error bit is set in the RX completion descriptor, the buf_state\nand its attached buffer should be freed. In the case of AF_XDP ZC, the\nXSK buffer was not freed, leading to a leak.\n\nThis issue was caught by LLM."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:N - A malformed Ethernet/IP packet received by gVNIC produces a DQO completion whose rx_error field denotes an invalid packet; gve_intr_dqo() schedules gve_napi_poll_dqo(), which reaches the patched gve_rx_dqo() through gve_rx_poll_dqo().\nAC:L - With a DQO-RDA AF_XDP zero-copy queue active, the sender can repeatedly transmit packets classified by the device as invalid; gve_rx_dqo() then deterministically takes the rx_error branch without a race or memory-layout dependency.\nPR:N - The gve_rx_dqo() receive path performs no authentication or capability check; xsk_create()'s CAP_NET_RAW check and XDP attachment are victim-side service provisioning, while the remote sender needs only packet access.\nUI:N - After gve_reg_xsk_pool() activates the pool, gve_intr_dqo() and NAPI process each error completion automatically without any victim action.\nS:U - The leak affects the guest kernel's own GVE XSK pool and DQO receive queue; it neither bypasses an IOMMU nor crosses the guest/hypervisor boundary.\nC:N - The lost xdp_buff_xsk remains allocated but unreturned; the branch performs no out-of-bounds read or data return, and gve_alloc_buf_state() clears the stale pointer before reusing the state.\nI:N - In the vulnerable XSK case, gve_free_buffer() releases only page-pool state and the buf_state while leaving the XSK object allocated, causing resource loss without a dangling access, memory corruption, or unauthorized modification.\nA:H - Each error completion omits xsk_buff_free()/xp_free(), removing one frame from the fixed XSK pool; repetition makes xsk_buff_alloc() fail in gve_alloc_buffer(), prevents RX-buffer reposting, and can stop the bound receive queue until the pool or service is reset."}]}],"providerMetadata":{"dateUpdated":"2026-10-24T14:10:10.249Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/06656aaa7e43ae62b673c2244d27099b8b94a70d"},{"url":"https://git.kernel.org/stable/c/889f763874855c575429f75946132a53c573aa14"},{"url":"https://git.kernel.org/stable/c/9fed6a8ab8a5bacba2c709cb19d2dd6d2fa9112e"}],"title":"gve: fix XSK buffer leak on error descriptor","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99046","datePublished":"2026-10-23T12:22:10.460Z","dateReserved":"2026-09-25T10:25:14.388Z","dateUpdated":"2026-10-24T14:10:10.249Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-23 13:17:28","lastModifiedDate":"2026-10-24 14:16:53","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99046","Ordinal":"1","Title":"gve: fix XSK buffer leak on error descriptor","CVE":"CVE-2026-99046","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99046","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ngve: fix XSK buffer leak on error descriptor\n\nWhen the error bit is set in the RX completion descriptor, the buf_state\nand its attached buffer should be freed. In the case of AF_XDP ZC, the\nXSK buffer was not freed, leading to a leak.\n\nThis issue was caught by LLM.","Type":"Description","Title":"gve: fix XSK buffer leak on error descriptor"}]}}}